Thanks for the comments guys.
And yeah, custom engine. I've made and finished 2 jam games using JS with no libraries so far, and some other projects, And I know my needs are minimal, so when I eventually iron out all the bits I hacked in, I think it'll be the quickest way for me to make games. And it solves the problem of languages that have a lot of APIs, and that's learning all the APIs, lol.